Type-writing machine.



No. 881,951. v W. I. 'HELMOND & F. A. COOK.

TYPE WRITING MACHINE.

APPLIOATION FILED JAN. s. 190e. l 2 SHEETS-SHEET 1.

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PATENTED SEPT. 25, 1906.

No. 831,951. PATENTED`SEPT,25,1906. W. R'HELMONDVaL P. A. 000K. TYPE WRITING MAGHINE.

`APPLIUATION' FILED JAN. 3. 3.906.l

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Wit es e yf?" s 5 om@ MQLLJZS UNITED sTAfrEs WILLIAM' E; HELMOND AND. FRANKV A. COOK, OF HARTFORD, consacre OUT, Assis-Noes ro UNDEEWOOD TYPEWEITEE COMPANY, or NEW PArENT OEErOE.

' YORK'N. Y., A CORPORATION OF NEW JERSEY.

TYPE-'WRITING MACHINE.,

Specification of Letters Patent.

Application tiled January 3, 1906. Serial No. 294.424.

To all whom it may concern/f y Be it known'that We, WILLIAM F. HEL- MOND and FRANK A. COOK, citizens of thel United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Imi provements in Type-Writin Machines, of which the following is a spec'y cation.

to be operated by the ribbon, as by means of knots or obstructions ixed 4upon the ribbon.

, When the ribbon is paid off from 'either s o'ol,

the obstruction upon that end of the ri bon engages the associated arm and .vibrates the same, therebyr putting a -yspring under tension, which spring is caused to press against a driving-shaft, therebyT tending to shift the shaft into connection with the empty spool. A stop Or a latch prevents the shifting of t ev shaft however,until the springgains sufficien tension, whereupon the continued movement of the ribbon-arm serves to release -said sto orlatch, and thereupon the driving-shaft 1s shifted by means of the tensioned spring, and a companion stop drops into place to prevent reverse shiftin of the shaft.

The invention also includesV improved means:y for enabling a reciprocating part of the machine to impart rotary movement to the driving-shaft.

In the accompanying drawings, Figure '1 is a front elevationof the improvements asapplied to the well-known Underwood front-- strike lwriting-machine,` the partsf being shown in full lines in normal positions. The f left-hand spool is shown empty` and the dot ted lines indicate the movements' of the rib. bon-arm, &c. Fig. .-2 is asectional front elevation illustrating details of means for `rotating the ribbon-driving shaft'.-` Fig. 3 shows Y details of themechanism seen atiFig. 2. Fig.

4 is a plan, partly in section, of apart 'of the stop mechanism for controlling the shifting of the ribbon-drivingshaft. "Fig, 5 is aplan of one of theribbon-spools andr adjoining parts. .I t l The ribbon I1 is wound upon-spools 2 and 3 and threadedA through an intermediate vibrator 4, the spools seated in cups 5 6 and mounted uponthe tops of vertical Windinga shafts 7 8. Upon the-.bottoms of the shafts are secured ruiter-'gears 9 1G, to mesh with. ruiter-gears 11 12, thelatteriixed upon a I horizontal driving-shaft 13 such a manner This invention relates to the ribbon-winding mechanism of type-'Writing and otherA that by shifting tlie latter endwise one pair ofgears may be disenga ed and the other pair engaged. -At Fig.v 1t e gears 10 and12 iare shown in engagement, and the ribbon is wound upon the right-hand "'spoo 3,. the gears 9 and 11 being'separated. The. shaft 13 is rotated intermittentlyby means of a inion 14, which is inmesh With'a gear 15, ed u on said shaft 13, `the pinion 14'being rotate by a lever 16, which 1s causedto vibrate by means of a reciprocatin member V17 of the type-writing machine. he windmechanism-issubstantially the same for eac spool, so that a description.

mg and revers' of one will serve for both.

The ribbon is threaded thron h a fork 18, provided u on the up er end o a vibratin arm 19. Vghen the ri bon is nearly all pain off from the empty spool 2, an Obstruction 20 upon the ribbon catches -in said fork and vibrates the arm to the right and backwardly, as seen in dottedA lines, the upper end of the arm, being guided formed in a `fixed arm 22.y At its lowerend the arm 19 is connected to a horizontal shaft 23, mounted in a bearingv 24 and extending forwardly and rearwardly and having heads 25 26. When the arm .19 is rocked bythe ribbon, the shaft 23 turns', and' a springer In a diagonal slot 21,`

yielding finger 27, fixed upon the head .25,

porarily restrained by a latch or stop 29. but

the continued movement of the ann-19 'not only increases the tension of the spring 2 7,

but also swings up an arm 30 to engage a pin 31, iixed uponthe stop 29, therebyliftin the latter-and releasingA the collar 28 and s aft y13, so that the s ring 27 pressesthe .latter Aendwise to the eft, thus disengagingthe gearsl() 12 and rengaging the ars 9 11j,- so that subsequent rotation` 'of t e shaft 13. causes the spool-shaft7 to Windxand the di rection of the ribbonvto bla-reversed. Said.

seinen.

stop-releasing arm 30 is fixed upon the head I formed with a cone 49, and these coperate 26 of the shaft 23.. The arm 19 has at its 'i with corresponding cones formed in the ends from the spool 3, a similar operation takes place, the s ring 27 for this spool pressing against a co lar 35 upon the shaft 13 and the shifting movement of the latter being temporarily restrained by a stop'36. The stops 29 and 36 are constantly pressed down by,

light springs 37A which are fixed upon the bearing member 24.

Mounted loosely upon each of the spoolshafts 7 and 8, near its upper end, is a detentarm 38, having a hub 39, in which is formed a recess 40, in which is placed a compressionspring 41 and ball 42. The springA presses the ball against the shaft, thereby producing constant friction between the latter and the detent-arm or hub'. By this means the arm is given a constant tendencyT to rotate in the same. direction as the shaft. During the unwinding of the spool the detent-arm presses 4against the ribbon-arm 19; but when the latter is thrown b'ackwardly by the ribbon as seen in dotted lines, it clears said detent-arm, and the latter thereupon rotates with the shaft 7 to the dotted-line position at Fig. 5,

this movement being arrested by a'fixed stop 43, the detent having a forked end 44, within which said stop is placed. When the detent is in the operative position seen at Fig. 5, it locks the ribbon-arm 19, thereby preventing premature return of the latter to normal position, which might occur, partly because of 'the reaction of its spring 27 and partly because of the pull of its returning-spring 34. Thus the detent locks the arm 19 in operative position and assures the full benefit of the energy which has been stored up in the spring 27, which does the shifting of the driving-shaft 13. lWhen the -shaft 7 begins t-o wind, the detent 38, turning therewith, returns t-o normal position, thereby releasing Athe ribbon-arm 19. The latter is returned to l ar 47 or an intervening washer 52.

5 ver 16 has a clutch to operate the inion-bar Said barrel comprises two parts, of which the ead a shoulder 46, upon which the lever 16 vibrates., The other part of said barrel cong sists of a collar 47, fitted upon asmall shank portion of the screw. Said shoulder 46 is i, endwise-shiftable driving-shaft, collars on ormed with a cone 48, and said collar is l said driving-shaft, stops or latches to engage rel, said clutch consisting of a ba l or roller, (shown in an inclined slot 54 in the hub of the lever,) so as 'to run free when the lever is retracted, but to bite the shoulder 46 when the lever is advanced. The bushing 50 is fixed ina bracket 55, forming apart of the framework or casting of the machine and also having a bushing 56, in which one end of the shaft 13 is journaled. Secured to f said bracket 55 is a fixed plate 57, having an eye l58, through which the collar 47 passes, and

also having'a ball 59 working in an inclined slot 6() and serving as a back-check for the pinion-barrel. The driving-shaft 13 may, however, be otherwise ,rotated within the scope of our improvements.

Having thus described our invention, we

4 claim- 1. In a type-writing machine, the combination with a pair of ribbon-spools and an endwise-shiftable shaft for winding the spools, of a pair of stops, springs for setting said stops, means upon the driving-shaft for cooperating with the stops in alternation to prevent endwise movement of the shaft,l arms mounted in the path of the ribbon to be moved thereby, springs associated with said arms, means upon the drivingshaft to ,coperate 'with the last-mentioned springs in alternation for shifting the shaft endwise, and means controlled by said arms for releasing said stops when said shifting-springs have been put under tension.

2. In a type-writing machine, the combination with a pair of ribbon-spools and an endwise-shiftable shaft for winding the spools, of collars upon the driving-shaft, movable spring-pressed stops mounted upon the framework in position to ride idly upon said collars, the latter so placed that by a. movement in one direction one of said stops will engage its collar in a manner to lock the shaft, and when the shaft is moved in the.

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movable in alternation by the ribbon, springs V which are put under tension b v the movevments of said arms, for shifting the drivingshaft endwise, and means also called into operation by said arms in alternation afterits spring is tensioned, for releasing the shaft from the control of the stop so that the tensioned spring may shift the shaft endwise.

3. in a type-writing machine, Athe combination of a pair of ribbonrspool shafts, an

driving-shaft endwise, arms connected to said ribbon-arms for releasing said stops, and springs to return said ribbon-arms to normal positions.

4. In a type-writing machine, thecombination with a pair of ribbon-spool shafts and a shiftable driving-shaft, of stops'for preventin shitinr of the driving-shaft, spr-ings foi-,shi ting said driving-shaft, arms operable by the ribbon for putting said springs under tension, a pair of normally idle detents, andv means for enabling said detents to prevent premature return ofsaid arms to normal positions and for releasing said detents.

5. In a type-Writing machinefthe combi-l nation with a pair of ribbon-spool shafts and a driving-shaft, of yielding means controlled by the ribbon foreiiecting disengagement between said driving-shaft and one of said spool-shafts and engagement between said driving-shaft and the other of said spool-v shafts; and a detent mechanism l having means for preventing return of said yielding means to normal position after disengagement from one spool-shaft and before 'engagement with the other spool-shaft.. p

6. A"In a type-writing machine, the combination with a pair of ribbon-spools and an endwise-shiftable `shait for winding the spools, of a pair of stops, springs for setting said stops, means upon the'driving-shaft for cooperating with the stops in alternation to prevent endwise movement of the shaft,

' arms mounted in the path ofthe ribbon to be moved thereby, springs associated with said arms, means upon the driving-shaft to coperate with the last-mentioned springs in alternation for shifting the shaft endwise, means upon said arms for releasing said stops when said shifting-springs have been put under tension, a pair of detents, and means for moving said detents-into the path of said arms to prevent premature return of the latter to lnormal positions, and for releasing said arms from the'control of the de'tents-when the rib-` bon begins to rewind upon the empty spool.

7. In atypefwriting machinethe combination with a pair of ribbon-spool shafts, of a driving-shaftfor said spools, arms movable in alternation by the ribbon, springs putun der tension by `the arms, for.-V shiftingI said driving-shaft, stops or latches .which prevent said springs from movin said"lriving-shaft,' means'v controlled by said armsi'or releasinsaid stops, deterits loosely mounted upon sai spooldshafts and ca able ofV rotation therewith, and friction evices tendin to cause said detents to rotate with saids aits, said"4 detents being hept in normal` positions-by said arms, and being moved by said shafts behind the arms as the latter are operated by the ribbon, and eachl arm being released from its said detent by the reverse movement of the latter caused by the opposite rotation of the spool-shaft when the ribbon begins to Wind upon the empty spool. l

8. In a type-writing machine, the combination with a pair of ribbonspool shafts, of a shiftable driving-shaft, a pair of stops eiective in alternation to pervent endwise shiftin of said shaft, arms mounted in the'path or the ribbon and movable thereby in alternation, stop-releasing arms connected to said ribbon-arms, yielding ymeans for effecting endwise shifting of said drivin shaft, detents mounted upon said spool sha ts, each detent havinga spring and a ball pressed by; the

. spring against the shaft;v eac datent' eing turned by its shaft behind its arm when the latter is moved bythe ribbon, and being also;

restored to normal postition by the reverse movement of thespool-shaft when the ribbon begins to wind upon its spool, and means for vlimiting reciprocation of said detents.

9. In a ribbon-spool-winding mechanism, the combination with a drivin -shaft shiftable endwise, of a gear upon said shaft, a pinion in mesh with said gear during the shiftin movements oi the latter, alshaft or barre whereon said pinion is fixed, a reciprocatin lever loosely mounted upon said barrel an 'having an inclined slot and a ball therein for' clutching said barrel, and a iixed support for said barrel, said support having an inclined slot and ball for preventing backward slip of said barrel.

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1G. In a ribb on-spool-Winding mechanism,

the combination with a driving-shaft, of a gear upon said shaft, a pinion in mesh with said gear, a screw threaded into said pinion, a cone placed u on said screw, a pinion-cone formed upon t Ae head of said screw, copratl ing iXed cones forming ball-races, balls in said races, -a vibrating lever mounted lu on the head of said screw and havin a ba -clutch for turning the same, and a all-clutch between the screw and a i'ixed portion of the machine, for preventing backward rotation ofthe screw and pinion. I

11. In a type-writing machine, the combination with a ribbon-spool and an endwise IIO shiftable shaitfor Winding thespool, of a l stop, a spring for setting said stop, means u on the driving-shaft for coperating with t e stop to prevent endwise movement ofthe shaft, an armmounted in the path of the ribf bon to be moved thereby, a s ring associated with said arm, means upon t e driving-shaft to coperate with the last-mentioned spring for shifting) the .shaft endwise, and means controlled ysaid arm for releasing said stop whensaid v'shifting-sp.ring has been put under tension". 1

12. In a type-writing machine, the combi- 'nation With a ribbon-spool shaft, and a shiftnation With a ribbon-spool and a shiftab'lel shaft for winding the spool, of a stop, a spring I for setting'said stop,l means upon the drivingshaft for coperating with-the stop to prevent shifting of the shaft, an arm mounted in the path f the ribbon-to b'e-moved thereby, a spring associated 'with saidarm, means'upon 'the driving-shaft to coperate With'the last? mentioned spring ior'shifting the shaft end- Wisefmeans upon said arm' for releasing-'said .it'op'when said shifting-spring has been put under tension, a detent, andmeansformov- Lng said detent'into -thepathofsaid armto prevent prematurereturnof thev latter fto, normal position, and for 'releasing "said'l arm senesi vfrom the control of the detent when theribbon begins torewind. v

14;. The 'combination With a ribbon-spool shaft, of a driving-shaft, an arm movable by the ribbon, a spring put under tension by the arm., for shiftingsaid driving-shaft, a stop or latch which prevents said spring from moving. said'driving-shaft, means controlled by lsaid arm for releasing said stop, a detent loosely mounted upon said spool-shaft and capable of rotation therewith, and a friction device tending lto cause said detent to rotate Withsaid spool-'shaft ;vsaid detenlt being kept in' normal position =by said arm, and being moved by saidspool-shaft behind the arm as the Ilatter isuoperated by the ribbon', and the -a'rm being released from its said-detent'by the reverse'movement lof' the latter caused by theo posite'rotation1 of the spool-shaft when bon begins-to Wind upon'the spool.

the r1 vWILLIAM F. HELMOND. FRANK A. COOK.

Witnesses:

EDW. J MANNING', EDWIN C. SMITH. 

